Evaluation of contact tracing performance during an Ebola virus disease outbreak in a complex security environment: the case of North Kivu province, Democratic Republic of the Congo, 2018-2020.

Background: Contact tracing remains a pillar public health strategy for containing Ebola virus disease (EVD). During the 2018-2020 EVD outbreak in the Democratic Republic of the Congo (DRC), contact tracing was implemented on an unprecedented scale. Here, we assessed performance of contact tracing implemented in affected health zones, and identified risk factors associated with incomplete follow-up.